I've been beating on clients on this issue already, only selling systems that can support Win11 for over a year. Everything for the most part is still on Win10, but 11 is there... ready to roll.
It's not hard...
Also, I now know more about what a TPM module is and does and the short version? We need them... NOW. This shift Microsoft has forced is as usual two years too late to meet reality.
I'll lay this out simply.
If you're an MSP and you plan to stay in business you must become an MSSP or you will die.
MSSPs cannot be one man shows, so it's grow or die time, but that's a side point to this conversation... If you want to put that second S in there, you need to know what TPM is and why it's a critical component of that reality. Which means if you're an MSSP you're already shoveling out TPM enabled hardware as fast as you possibly can.
If any of the above doesn't make sense, it's time to get caught up or be destroyed in the coming recession as this shift takes hold.
For shops that focus on residential, TPM is almost more important but it's also not really your problem. Their existence will be largely transparent to you, other than Win11 requires one so can't help you if you don't have it, other than here's an upgrade.
For those that want to know why TPM is so important, read up on what a Cryptographically Secure Pseudorandom Number Generator (CSPRNG, or CSRNG) is and what it does.
This shift is tectonic in nature, and I didn't understand it until very recently myself.